A study of dual polymer conditioning of aluminum-based drinking water treatment residual

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Title: A study of dual polymer conditioning of aluminum-based drinking water treatment residual
Authors: Ma, W.
Zhao, Y.Q.
Kearney, P.
Permanent link: http://hdl.handle.net/10197/3171
Date: Jan-2007
Abstract: Conditioning of an alum-based water treatment sludge by single and dual polymers was investigated in this study. Capillary suction time (CST), specific resistance to filtration (SRF) and settling rate of conditioned sludge were used to evaluate the sludge dewatering characteristics. Sludge dewaterability resulting from single and dual polymer conditioning were compared for the purpose of exploring the validity and effectiveness of dual polymer conditioning strategy. Unlike activated sludge derived from wastewater treatment, results from this study have demonstrated that conditioning of the alum sludge by the combined use of an cationic polymer (FO-4140) followed by an anionic polymer (LT-25) does not exhibit considerable advantage in further improvement of sludge dewaterability with comparison of single polymer conditioning. This study supports the view that for alum-based water treatment sludge, inter particle bridging seems to be the dominative mechanism and the charge neutralization plays a less important role in the conditioning process. In addition, an intrinsic relationship between CST and SRF was deducted and tested via the experimental data obtained from the study.
Funding Details: Not applicable
Type of material: Journal Article
Publisher: Taylor & Francis
Copyright (published version): Taylor & Francis Group, LLC
Keywords: Alum sludge;Capillary suction time (CST);Conditioning;Dewaterability;Polymer;Specific resistance to filtration (SRF)
Subject LCSH: Water treatment plant residuals
Sewage sludge--Conditioning
Sewage--Purification--Filtration
Water--Purification--Filtration
Polymers
DOI: 10.1080/10934520701370261
Language: en
Status of Item: Peer reviewed
Appears in Collections:Centre for Water Resources Research Collection
Urban Institute Ireland Research Collection
Critical Infrastructure Group Research Collection
Civil Engineering Research Collection

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